pci.h

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#ifndef __HAL__PCI__PCI_H_
#define __HAL__PCI__PCI_H_
 
#include <type.h>
 
#define MAX_PCI_BUS 256
 
typedef struct pci_access_ops {
    uint32_t (*read32)(uintptr_t base, uint8_t bus, uint8_t dev,
               uint8_t func, uint16_t offset);
    void (*write32)(uintptr_t base, uint8_t bus, uint8_t dev, uint8_t func,
            uint16_t offset, uint32_t val);
} pci_access_ops_t;
 
#define PCI_MAX_SEGMENTS 16
 
typedef enum : uint8_t {
    PCI_SEGMENT_LEGACY = 0,
    PCI_SEGMENT_PCIE = 1,
} PCI_SEGMENT_TYPE;
 
typedef struct pci_segment {
    uint16_t segment_id;
    uint8_t bus_start;
    uint8_t bus_end;
    uintptr_t vbase; /* virtual base setelah di-mmap */
    pci_access_ops_t* ops;
    boolean_t valid;
    PCI_SEGMENT_TYPE type;
} pci_segment_t;
 
enum PCI_HEADER_TYPE {
    PCI_HEADER_TYPE_STANDARD_DEVICE = 0,
    PCI_HEADER_TYPE_PCI_TO_PCI_BRIDGE = 1,
    PCI_HEADER_TYPE_CARDBUS_BRIDGE = 2,
};
 
void pci_scan();
 
uint32_t pci_read32(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off);
uint64_t pci_read64(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off);
uint16_t pci_read16(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off);
uint8_t pci_read8(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off);
void pci_write32(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off,
         uint32_t val);
void pci_write64(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off,
         uint64_t val);
void pci_write16(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off,
         uint16_t val);
void pci_write8(uint8_t bus, uint8_t dev, uint8_t func, uint16_t off,
        uint8_t val);
 
uint32_t legacy_read32(uintptr_t base, uint8_t bus, uint8_t dev, uint8_t func,
               uint16_t offset);
void legacy_write32(uintptr_t base, uint8_t bus, uint8_t dev, uint8_t func,
            uint16_t offset, uint32_t val);
 
void register_segment(uint16_t seg_id, uint8_t start, uint8_t end,
              uintptr_t vbase, pci_access_ops_t* ops,
              PCI_SEGMENT_TYPE type);
#endif // __HAL__PCI__PCI_H_